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Unusual phenomena in the new emission phase of X Persei
Liu, QZ; Hang, HR
AbstractWe present a series of optical spectroscopic and infrared photometric observations of the Be/X-ray system X Per in 1992-95. Some phenomena in this new emission phase turn out to be unique in comparison with former observations. First, although the V magnitude only recovered its original maximum brightness from 1974 to 1991, the equivalent width (EW) of H-alpha emission line and JHK magnitudes exceeded the values recorded before, and this means that the circumstellar envelope of X Per in the new emission phase is more extensive and denser. Second, we have for the first time observed in X Per that the EW of H-alpha line increased rapidly while the JHK magnitudes declined considerably. Our optical spectroscopic data support the rotating ring model of the envelope and confirm the existence of the double-ring structure, with which the observed unusual phenomena may be fairly well interpreted.
KeywordBe/x Binary Emission Line Jhk Photometry
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000082336500010
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Document Type期刊论文
AffiliationChinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Liu, QZ,Hang, HR. Unusual phenomena in the new emission phase of X Persei[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,1998,22(2):192-197.
APA Liu, QZ,&Hang, HR.(1998).Unusual phenomena in the new emission phase of X Persei.CHINESE ASTRONOMY AND ASTROPHYSICS,22(2),192-197.
MLA Liu, QZ,et al."Unusual phenomena in the new emission phase of X Persei".CHINESE ASTRONOMY AND ASTROPHYSICS 22.2(1998):192-197.
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